Resistant submarine hull or the like



June 2, 1931. I L Z 7 1,808,599

RESISTANT SUBMARINE HULL OR THE LIKE Filed Sept. 22, 1927 gwumto'v 180135270 Gaza/1221 Patented June (2,

UNITED STATES v f V v, 1,808,599Y} PATEN Tljemciz j v 2 ROBERTO GALEAZZI, F MUGGIANO, SPEZIA, ITALY" RESISTANT SUBMARINE from. Qumran LIKE i i Application filed September 22, 1927, swarm. 221,275, and in'ltaly dctolier 25,. 1926.

My invention relates generally to resistant shells or casings ofelongated receptacles subjected to either external or internal pressure,

and aims at providing a shell which will 5 practically act as a sphere throughout its as the radius, and being subjected to a pres- 7 sure 1?, either external or internal, the elementary stress on the cylinder wall is P R, while by a sphere also having R as the radius and being subjected to a pressure P, the stressis I a v This substantially means that the sphere shell may be made of a thickness equal to half the thickness of the cylinder shell, while 4 while not being shaped as a whole to a sphere,

consists of a number of adjacent portions which embody the property that I whatever cross section made by a plane-either at right angles or inclined to the-axis of'the hullbetween any pairof adjacent web frames, substantially is a circle or an arc of circle having R, R, asthe radius. words, any portion of plating between two subsequent web frames is a spherical zone.

hydrostatic pressure.

In Fig. 8 I have shown the decomposition In other 7 In any such z one the elementary stresses are throughout equal I and the m'aterial 'isthroughout subj ectedjonly to compressive stresses due to the external Should here be. the'matter of a receptacle subjected to internal pr i by pre'f ea or pressure-liquid contain r it stresses equal to 7 in Fig. "1 the parallel end was F denote the axial thrust on theend'plates of the hull, or like bottoms of any other elongated receptacle; R, R, denote the radii ofthe several portions, and O are web fram s; or circular ribs to strengthen the structure and to attach thespherical plating portionsflthere t In Figs. toil? inclusive I have shown'by way of example different shapes ofrolled irons O andarrangements of the plating inconnection therewith. j j. V v I As shown,'t-he frame irons are preferably T- irons or bulb rails which may totallybe en'- closed internallyof the plating(Figs. 2 and 4) ,=or. have the flange internally; thereof and theifweb "projecting f'externally therefrom Figs. 3 and 5), while having the flange flat Figs-Qand 3) 0'1 angular-in cross section (Figs. 4: and 5); Composite frame irons may also beused (Figs. 6 and 7), by arranging'a bulb rail outside of the platin .and pr'ovid,* ing a supplemental flat iron ig. '6) or an 7 angle iron (Fig. 7) opposite the flange of the we iron, and prefera ly enclosing the plat-: ings therebetween. Of course, the bulb rail may be arranged insideand the supplemental iron outsideof the plating.

of the force a ll taken as the stress in a point of the peripheral f would only resist throughoutfto tensile a '7 a f as a intersection of two adjacent spherical zones. The component A of said force,'c0ntained. in i a an axial plane and parallel'to the axis of the container, is resisted by the axial thrusts F (Fig. I) on the end. plates or bottoms, While theradial component B of said force, at right,

7 angles to the axis of the container, is resisted by the compressive strength ofgthe Web frames or ribs 0. r

l A shell as described,'either as the resistant} hull of a submarine or as the; long'tudianal Wall-of any elongated receptacle generally, has the advantage that the material thereoi may be made to Work throughout uniformly. I WhatIcl'ai'm'is: e o 1. A rigid circumferentially corrugated container of circular cross section, comprising a shell made of adjacent nonresilient spherical undivided sections,- 'the centers of said 90 sections lying on the longitudinal axis of the container, and circular cross frames stiifem ing said spherical sections at the points Where they unite. V I p -2. A submarinehull oiijcircular cross Se'c- 2r) Q pa le I of resisting external' and" inter-v nal pressure, comprising'a shell mad of rigid platein undivided sectionsin thei'orm of spherical Zones connected at tlfieir' ends, and spaced circular stifiening'fr'ames for said I plate sections located at the planes Where said sections interfere or, connect.

A submarine hull'of circular cross section capable of resisting external and internal pressure comprising longitudinally spaced circularfframes parallel to eachother and at right angles 'tofthe axis of the hull, an'dia hullplating consisting of connected 'nndi vidjed sections in the form. of sphericaljzones', said frames being attachedthereto at the 40 points of connection,ofsaidzones. i 4'. A shelljor casing}iricl'uding connected sphericalzone'scomp o's'ed' 'of non resiliient maiteria'l' arranged endt'o endfand' provided" with circular reinforcements between and at the 4-5 points of connection of said zonest'o adapt them. to resist both inside "and outside pressure." I

' "In; testimony whereof, I setiny hand at i a 7 V Gei lzoa, Italy, thisj2ndi day of September, j

.j 'w BQBERTOGALEAZZL;

I so 

